Book Image

Azure Serverless Computing Cookbook - Third Edition

By : Praveen Kumar Sreeram
Book Image

Azure Serverless Computing Cookbook - Third Edition

By: Praveen Kumar Sreeram

Overview of this book

This third edition of Azure Serverless Computing Cookbook guides you through the development of a basic back-end web API that performs simple operations, helping you understand how to persist data in Azure Storage services. You'll cover the integration of Azure Functions with other cloud services, such as notifications (SendGrid and Twilio), Cognitive Services (computer vision), and Logic Apps, to build simple workflow-based applications. With the help of this book, you'll be able to leverage Visual Studio tools to develop, build, test, and deploy Azure functions quickly. It also covers a variety of tools and methods for testing the functionality of Azure functions locally in the developer's workstation and in the cloud environment. Once you're familiar with the core features, you'll explore advanced concepts such as durable functions, starting with a "hello world" example, and learn about the scalable bulk upload use case, which uses durable function patterns, function chaining, and fan-out/fan-in. By the end of this Azure book, you'll have gained the knowledge and practical experience needed to be able to create and deploy Azure applications on serverless architectures efficiently.
Table of Contents (14 chapters)
13
Index

Implementing feature flags in Azure functions using App Configuration

Usually, when we are working on enterprise projects, we are working on multiple large applications where we have individual app settings stores for every application. The app settings would be either specific to an application or common across all applications.

For example, if we have one database that is used by multiple applications, then we have to have the same connection string in each of those applications. If we have to change something (such as a password) in the connection string, we would need to change it in all the configurations of all the projects.

In order to solve this problem, Azure provides a service called App Configuration, which can be used to externalize configuration items. When we take configurations out of the scope of the individual project, we can use them in multiple applications.

In this recipe, we'll learn how to do the following:

  • Externalize app configurations...